F684 2rs
F Series Flanged Miniature Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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F684 2rs Bearing Product Overview & Core Advantages
The F684 2rs is a metric miniature ball bearing designed for compact, high-precision applications requiring reliable performance. As a single row deep groove ball bearing, it excels at handling primarily radial loads. Its key advantages include its sealed construction with nitrile rubber contact seals (2RS), which effectively protect against contamination and retain lubricant, making it suitable for applications demanding long-term, low-maintenance operation. The combination of chrome steel rings and a stainless steel cage ensures durability and consistent performance within its specified temperature range.
F684 2rs Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| F684 | Basic bearing designation, indicating the bearing size (4mm bore, 9mm OD, 4mm width). | Defines the core dimensions and internal geometry of the bearing. |
| 2RS | Indicates the bearing is fitted with two (2) Nitrile Rubber (RS) contact seals, one on each side. | Provides excellent protection against dust, moisture, and other contaminants, while retaining lubricant for extended service life. |
F684 2rs Bearing Structural Features & Performance Benefits
Optimized for Miniaturization and Reliability: The single row deep groove raceway is precision-engineered to facilitate smooth operation and efficient radial load support. The use of seven precision chrome steel balls ensures low vibration and noise. The stainless steel cage provides secure ball guidance and is corrosion-resistant. The defining feature is the nitrile rubber contact seals (2RS), which not only shield the internal components from contaminants but also effectively retain the factory-applied lubricant. This sealed design contributes to a maintenance-free operation in many applications, reducing total cost of ownership. The ABEC1 tolerance class guarantees consistent dimensional accuracy for reliable performance in a wide range of precision mechanisms.
F684 2rs Bearing Typical Application Areas
The F684 2RS is ideally suited for compact devices and precision instruments where space is limited and reliable, long-life rotation is critical. Common applications include:
- Small DC Motors and Gear Motors
- Precision Instrumentation and Laboratory Equipment
- Office Automation Equipment (e.g., printers, scanners)
- Medical Devices and Dental Handpieces
- Robotics (small joints and actuators)
- Radio-Controlled Models and Drones
